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Polar and Apolar Columnar Phases Made of Bent-Core Mesogens

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Liquid Crystals

Part of the book series: Topics in Current Chemistry ((TOPCURRCHEM,volume 318))

Abstract

Structural studies of two-dimensionally ordered phases made of bent-core mesogens are presented, with the emphasis on the X-ray studies of the columnar phases built of smectic layer fragments. We present the evidence for two types of packing of layer fragments: the B1-type structures where the layers are broken into blocks arranged into the orthogonal body centered lattice and the B1rev-type structures made of slightly deformed layers, where the primitive crystallographic unit cell is in general oblique. In some cases two-dimensional structures made of bilayers are observed. Bilayers are characteristic for the general tilt phases, which possess a longitudinal polarization component, in the direction perpendicular to the smectic layer fragment. We also outline the theoretical model predicting and describing the observed structures and present a model which enables the calculation of the electron density maps from the X-ray diffraction data.

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Acknowledgments

The work presented was supported by the Slovenian Research Agency through the research program P1-0055 and by the Polish-Slovenian bilateral projects BI-PL/08-09-015 and BI-PL/10-11-010.

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Authors and Affiliations

  1. Faculty of Natural Sciences and Mathematics, Institute of Physics, University of Maribor, Koroška 160, 2000, Maribor, Slovenia

    N. Vaupotič

  2. Jozef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia

    N. Vaupotič

  3. Department of Chemistry, University of Warsaw, Al. Zwirki i Wigury 101, 02-089, Warsaw, Poland

    D. Pociecha & E. Gorecka

Authors
  1. N. Vaupotič
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  2. D. Pociecha
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  3. E. Gorecka
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Correspondence to E. Gorecka .

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Editors and Affiliations

  1. , Institute of Chemistry, Martin-Luther-University Halle-Wittenber, Kurt Mothes Str. 2, Halle/Saale, 06120, Germany

    Carsten Tschierske

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Vaupotič, N., Pociecha, D., Gorecka, E. (2011). Polar and Apolar Columnar Phases Made of Bent-Core Mesogens. In: Tschierske, C. (eds) Liquid Crystals. Topics in Current Chemistry, vol 318. Springer, Berlin, Heidelberg. https://doi.org/10.1007/128_2011_231

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